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IOT: How to Capture all Log Files from Systems, Applications & Sensors
- Fluent Bit is a tool for logfile aggregation, processing, and storing, ideal for an IOT context due to its flexible plugin architecture and small footprint.
- This article explains configuring Fluent Bit to gather logfiles in an extended IOT environment, including capturing log files from systems, Docker containers, other systems, and IOT devices like ESPHome and Home Assistant.
- Different types of log files in an IOT environment include system logs, external system logs, IOT application logs, and sensor logs.
- Fluent Bit needs to be configured to tail system log files and mount them to the Fluent Bit container for capturing host system logs.
- For external system logs, Fluent Bit can listen to syslog messages over UDP on port 514 to capture logs from other computers and appliances in the network.
- IOT application logs from Docker containers can be captured by configuring Fluent Bit as the logfile driver for the containers and ensuring they share the same network.
- Capturing sensor logs from devices configured with ESPHome involves using MQTT messages for log output and configuring Fluent Bit to listen to these messages.
- Logfile visualization can be done through tools like Grafana and Chronograf, offering features like filtering logs, extracting fields, visualizing log counts, and more.
- Grafana allows filtering logs for specific origins and visualizing log counts per timespan or keyword, while Chronograf's log viewer may have limitations in handling structured log data.
- Overall, systematic logfile aggregation in an IOT network using tools like Fluent Bit and visualization tools helps in processing and analyzing log data effectively for monitoring and troubleshooting.
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